docs: def Sigmoid(input_vertex: vertex_constructor_param_types, label: Optional[str]=None) -> Vertex:
      """
      Applies the sigmoid function to a vertex.
      The sigmoid function is a special case of the Logistic function.
      
      :param input_vertex: the vertex
      """
      return Double(context.jvm_view().SigmoidVertex, label, cast_to_double_vertex(input_vertex))